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From GitBox <...@apache.org>
Subject [GitHub] alerman opened a new issue #517: Tiered Storage Volume Chooser
Date Tue, 05 Jun 2018 12:46:10 GMT
alerman opened a new issue #517: Tiered Storage Volume Chooser
URL: https://github.com/apache/accumulo/issues/517
 
 
   For systems with a mixture of high density, slower disks and low density faster disks provide
a volume chooser that can be configured to put data accesses more often onto the faster disks.
This will require having the fast/slow disks partitioned into seperate volumes, and will also
require that the _majorCompact code be modified to use the volume chooser to determiner where
to put new files, instead of relying on srv:dir. This choice will be made based on the tablet
that is being compacted using a user defined strategy for how to decide which volume to use.
   
   Needed:
   
   1. New TieredStorageVolumeChooser
   2. New configuration options for the volume chooser
   3. Updates to major compaction code that determines the output file location (Specifcally
around line 1945 of Tablet.java)
   4. A VolumeChooserStrategy that can be user defined to allow users to define how to pick
the new volumes
   

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